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Based on geological field observations of more than twenty hydrothermal ore deposits,in conjunctionwith fluid inclusion studies,high temperature and high pressure experiments and elemental geochemistrydata,this paper discusses the melt-solution nature of granitic magma and the mechanism of formation ofintergranular solutions during cooling and local differentiation of the granitic magma.It is proposed thatore-forming fluids responsible for the ore deposits associated with granites have a close affinity tointergranular solutions.This concept can explain not only the source of such ore-forming fluids,but also themechanism of autometamorphism in granite bodies and its relationship with mineralization.Thus,theconcept of intergranular solution is of great significance in the study of metallogenesis.
Based on geological field observations of more than twenty hydrothermal ore deposits, in conjunction with fluid inclusion studies, high temperature and high pressure experiments and elemental geochemistrydata, this paper discusses the melt-solution nature of granitic magma and the mechanism of formation of intergranular solutions during cooling and local differentiation of the granitic magma. It is proposed that the ore-forming fluids responsible for the ore deposits associated with the granites have a close affinity to intergranular solutions. This concept can explain not only the source of such ore-forming fluids, but also the themechanism of autometamorphism in granite bodies and its relationship with mineralization.Thus, theconcept of intergranular solution is of great significance in the study of metallogenesis.